Clamp



FIG. 1 is a top plan view of the clamp showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a same side elevational view thereof, showing the clamp in the open position with the paper sheets being shown in broken lines for illustrative purposes only;

FIG. 4 is an exploded view thereof with the components of the clamp being shown separated for purposes of disclosure only. 

The ornamental design for a clamp, as shown and described. 